{
  "schema_version": 1,
  "schedule_id": "V05-demo-presentation",
  "synthetic": true,
  "total_seconds": 600,
  "stages": [
    {"id": "intro", "label": "Intro", "start_seconds": 0, "end_seconds": 90, "duration_seconds": 90, "remaining_seconds": 600},
    {"id": "demo", "label": "Demo", "start_seconds": 90, "end_seconds": 420, "duration_seconds": 330, "remaining_seconds": 510},
    {"id": "close", "label": "Close", "start_seconds": 420, "end_seconds": 600, "duration_seconds": 180, "remaining_seconds": 180}
  ],
  "presenter_view": ["schedule_id", "current_stage", "remaining_seconds", "finish_at"],
  "facilitator_view": ["schedule_id", "pause", "next", "finish", "fallback_note"],
  "checkpoints": {"start": 600, "after_intro": 510, "after_demo": 180, "finish": 0}
}